한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제45권11호
  • /
  • Pages.989-997
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  • 2017
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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연소기 산화제 개폐밸브 개방 특성

Opening Characteristics of a Main Oxidizer Shut-off Valve

  • Hong, Moongeun (Launcher Propulsion Control Team, Korea Aerospace Research Institute)
  • 투고 : 2017.06.10
  • 발행 : 2017.11.01
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초록

액체로켓엔진용 연소기 산화제 개폐밸브로 사용되는 밸브 개방 자체유지가능형 포핏밸브의 밸브 개방 특성을 파악하기 위해 밸브 개방 과정에서의 과도 응답 특성에 대한 연구를 수행하였다. 수치해석을 위해 구동가스 공급시스템을 하나의 오리피스로 모델링하고 밸브 행정 위치 및 구동압력 조건에 따라 밸브 무빙파트의 운동방정식을 유도하였다. 상온 및 연소시험에서의 밸브 작동 시험결과와 계산 결과의 비교를 통해 계산 결과의 신뢰성을 검증하였으며, 본 연구의 실제적인 적용 예로써 높은 구동압력에서의 밸브 개방 속도 조절을 위한 오리피스 적용 사례를 소개하였다.

We study opening transient responses of a self-sustainable poppet valve, which is usually used for the main oxidizer shut-off valve of liquid rocket engines. In order to perform numerical analysis, a pneumatic supply system was simulated as an orifice with a diameter of 3.2 mm and the equations of motion of valve moving part were derived. For the validation of the study, a comparison of numerical predictions and experimental results has been done. As one of the practical applications of this study, the employment of an orifice in a high pneumatic pressure has been presented to control the valve opening time.

키워드

참고문헌

  1. Jeon, J., Hong, M., Kim, H. and Lee, S. Y., "A Study on the Force Balance of Main Oxidizer Shutoff Valve,"Journal of the Korean Society of Aeronautical and Space Sciences, Vol. 37, No. 8, 2009, pp. 812-818. https://doi.org/10.5139/JKSAS.2009.37.8.812
  2. Kim, D., Kim, E., Kim, S., Park, S., Hong, M. and Lee, S. Y., "A Study on the Pneumatic Part Coatings Characteristics of a Main Oxidizer Shut-off Valve for Liquid Rocket Engines,"Proceeding of The Society for Aerospace System Engineering Spring Conference, May 2013.
  3. Kim, D., Hong, M., Park, J. and Lee, S. Y., "Study for the Development of a Main Oxidizer Shut-off Valve for Liquid Rocket Engines,"Journal of the Korean Society of Propulsion Engineers, Vol. 17, No. 6, 2013, pp. 113-119. https://doi.org/10.6108/KSPE.2013.17.6.113
  4. Hong, M., "Improvement of a Flow Coefficient for the Recirculation Flow in a Main Oxidizer Shut-off Valve,"Proceeding of The Korean Society of Propulsion Engineers Fall Conference, December 2016.
  5. Lee, H. and Hong, M., "On the Valve Travel of a Main Oxidizer Shut-off Valve," Proceeding of the 5th International Symposium on Fluid Machinery and Fluids Engineering, October 2012.
  6. John, J. E. A., Gas dynamics, 2nd edition, Prentice-Hall, 1984. pp. 42-55.
  7. Hong, M. "Acceptance Test of Main Oxidizer Shut-off Valve DM03-03 for a 75-tonf Liquid Rocket Engine," KARI-IDMS, L2-TR-00442, 2017.
  8. Hong, M. "Acceptance Test of Main Oxidizer Shut-off Valve DM05-03 for a 75-tonf Liquid Rocket Engine," KARI-IDMS, L2-TR-00904, 2016.